bulldog89
Blimey mate, you're all over the place, you seem to be saying that VNAV DOES include pitch control, which of course it does. You also seem to think that the AP doesn't hold an altitude, just a VS.
If you do RTFQ, it says for the FMS to control vertical navigation and since you've been told that there are aircraft without autothrottle many times, that do have an FMS and VNAV, I can only assume you are just choosing to ignore that. Good luck trying to fly a complete VNAV profile without changing the aircraft pitch angle at any time, meaning attitude of course, and although I now teach Pilots, I am an ex Aircraft Engineering Technician, and seem to recall pitch angle being mentioned a few times. Maybe my apprenticeship of 3 years was a little more extensive than yours? let's just agree to disagree, and good luck flying without pitch control 😉